Single Engine 

Service Bulletin 

June 18, 2007 

TITLE 

FUEL RETURN LINE INSPECTION 

EFFECTIVITY 

Model 

172R 

172S 

REASON 

Serial Numbers 

17281188 thru 17281390 

172S9491 thru 172S 1 0489 

A Textron Company 

SB07-28-01 

A report has been received that a part number 0500118-49 Fuel Return Line Assembly was found rubbing 

against the right steering tube assembly during full rudder pedal actuation. 

DESCRIPTION 

This Service Bulletin provides instructions to inspect the fuel return line for damage, and if necessary, repair or 

replace the line assembly. Non-compliance with this Service Bulletin could potentially result in a fuel leak. 

COMPLIANCE 

Mandatory: shall be accomplished at the next scheduled maintenance or inspection not to exceed 100 hours 

of operation or 12 months, whichever occurs first. 

APPROVAL 

FAA approval has been obtained on technical data in this publication that affects airplane type design. 

MANPOWER 

0.8 man-hour for inspection 

If necessary. add 0.4 man-hour to repair the fuel return line assembly 

If necessary. add 0.3 man-hour to replace the fuel return line assembly 

Page 1 of 7 

T~ obt~in satisfactory results , procedurt!s pccjfied in this publicnl;on must b(; ilccompl;.:ohed In occorJance with ..l.;c~p eJ riic;hoC:s Jr.j 

j:.(~va'ljng government regulatiOns. Ces.,.na AI(l.raft Company cannot be responsible for the Quality of work performed In accomplishing the 

'!jq ... !rcmenls of lMis publication. 

COPYRIGHT © 20()7 
REFERENCES 

Model 172 Series 1996 and On Maintenance Manual 

NOTE: Make sure all publications used are complete and current. 

NOTE: This information shall be considered an amendment to the Cessna Manufacturer's Service/Maintenance 

Manual or Instructions for continued airworthiness and must be accomplished for ongoing airworthiness 

compliance as required per 14 CFR Part 43.13. 

OTHER PUBLICATIONS AFFECTED 

Model 172R & Model 172S Illustrated Parts Catalog 

NOTE: Make sure all publications used are complete and current. 

MATERIAL PRICE AND AVAILABILITY 

The parts below are available from Cessna Parts Distribution through an appropriate Cessna Service Station 

for the suggested list price shown. 

Part Number Description 

0500118-49 Fuel Line Assembly 

Qty/Airplane 

1 (if required) 

Price 

$ 123.00 (S) ea 

ALL PRICES SUBJECT TO CHANGE WITHOUT NOTICE 

CREDIT INFORMATION 

A labor allowance credit of 0.8 man-hour per airplane will be provided to inspect the fuel return line assembly 

as described in this Service Bulletin. 

If necessary, an additional 0.4 man-hour per airplane will be provided to repair the fuel return line assembly or 

an additional 0.3 man-hour per airplane will be provided to replace the fuel retum line assembly as described 

in this Service Bulletin. 

Freight will be credited at the most economical method unless pre-approved by Cessna. For pre-approval 

contact Cessna Parts Distribution Warranty Administration at Telephone: 316-831-4296, Fax: 316-206-2746 or 

E-mail: cpd2claims@cessna.textron.com. 

To receive credit, the work must be completed and the Warranty Claim submitted by a Cessna Single Engine 

Service Station within 30 calendar days of Service Bulletin compliance before the credit expiration dates 

shown below. 

NOTE: Part number 0500118-49 fuel lines removed based on the inspection results of this Service Bulletin 

shall be held for field scrap per standard procedures. 

Domestic 

International 

Special Note to Service Station:;: 

June 18, 2008 

June 18. 2008 

li\fh8n i'OU comp~~tl} th'1- \N~rn':' t'J CI;--i"T', th8 !"1h:1'" O\·.I8n:~ r:!:1i'l1:-d '3 h-=!11 ~~ i!e:1""t:: ,:" j fer :::nr-:h :.,h""1·~ 'j+-; thn 

completed. 

Page 2 

S3e7 -28-U 1 

June 18. 2007 
ACCOMPLISHMENT INSTRUCTIONS 

Weight And Balance Information 

Negligible 

Material Information 

The part below may be necessary: 

NEW PIN DESCRIPTION OLD PIN 

0500118-49 

QUANTITY 

1 Fuel Line Assembly Same 

Instructions 

1. Prepare the airplane for maintenance. 

A. Make sure that all switches are in the OFF/NORM position. 

B. Disconnect electrical power from the airplane. 

(1) Disconnect the airplane battery. 

(2) Disconnect external electrical power. 

DISPOSITION 

Refer to Credit 

Information 

Section. 

C. Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT 

CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them. 

WARNING: IF THE AIRPLANE HAS AMSAFE INFLATABLE RESTRAINTS, DO 

NOT REMOVE SEATS WITH THE SEAT BELTS BUCKLED OR THE 

ELECTRONICS MODULE ASSEMBLY (EMA) CONNECTED. DAMAGE TO 

THE SYSTEM CAN OCCUR AND AN ACCIDENTAL DEPLOYMENT OF 

THE SYSTEM CAN CAUSE INJURY. 

2. Disarm the AMSAFE Inflatable Restraints. (Refer to the Model 172 Series 1996 and On Maintenance 

Manual, Chapter 25, Inflatable Restraint System - Maintenance Practices.) 

3. Get access to the 0500118-49 Fuel Return Line Assembly as follows: 

A. Remove the copilot's seat from the seat track and move it aft and away from the work area. (Refer 

to the Model 172 Series 1996 and On Maintenance Manual. Chapter 25. Flight Compartment 

- Maintenance Practices.) 

NOTE: You do not have to disconnect Ihe seat belt from the copilot's seat. 

B. Remove the access panel (230BT) and Ihe rudder pedal close-out panel below the copilot's 

rudder pedals. (Refer to the Model 172 Series 1996 and On Maintenance Manual, Chapter 6, 

Accessllnspection Plates - Description and Operation.) 

4. (Refer to Figure 1. View A-A.) Do an inspection of the 05001 18-49 Fuel Return Line Assembly as follows: 

A. With a flashlight and a mirror, do an inspection of the 050011 8-49 Fuel Return Line Assembly for 

damage in the area of the MC0543022-2C Steering Tube Assembly. 

(1) If there is no damage to the 050011 8-49 Fuel Return Line Assembly, go to Step 9 

(2) If there IS damage to the 050011 8-49 Fuel Return Line Assembly: 

:"o07-<!H-O I 

(D) p 'JII th~ (U ! shut· .... rr v ,lve h:mdle ar• :0 :-.rllt off tJ.,~ rU ':1! "]:.:pply :orn ~h ~ ';1J inp 

(b) Remove the 0500118-49 Fuel Return Line Assembly and install protective caps on the 

S2218-4 Check Valve. AN832-4 Union at the nr"wall . and each end of the 050011 Q-49 

:==u...:l R'Jturn Lin~"! '\~s~~ :lb ly , 

June 18,2007 Page 3 
(c) Make sure that there is only residual fuel leakage from the S2218-4 Check Valve after 

you disconnect the 0500118-49 Fuel Return Line Assembly, If there is more than residual 

fuel leakage, you must replace the S2218-4 Check Valve, (Refer to the Model 172 

Series 1996 and On Maintenance Manual, Chapter 28, Fuel Storage and Distribution -

Maintenance Practices,) 

(d) Do an inspection of the damage on the 0500118-49 Fuel Return Line Assembly. 

1 If there is damage in the area of a bend radius of the line, you must replace the 

0500118-49 Fuel Return Line Assembly, Go to Step 5, 

2 If there is damage on the line of a depth of more than 0,0035 inch, or you cannot 

measure the depth of the damage, you must replace the 0500118-49 Fuel Return 

Line Assembly, Go to Step 5, 

~ If there is damage on the line of a depth of 0,0035 inch or less and it is not in the 

area of a bend radius of the line, repair the damage to the 0500118-49 Fuel Retum 

Line Assembly with blending procedures in accordance with FAA Advisory Circular 

43,13-1 e Acceptable Methods, Techniques, and Practices Aircraft Inspection and 

Repair, Then go to Step 5, 

5, (Refer to Figure 1, View A-A,) Install the 0500118-49 Fuel Return Line Assembly as follows: 

A, Remove the protective caps from the 0500118-49 Fuel Retum Line Assembly, S2218-4 Check 

Valve, and AN832-4 Union at the firewall. 

e, Hand tighten the 8-nuts at the two ends of the 0500118-49 Fuel Retum Line Assembly, 

C, Put the 0500118-49 Fuel Return Line Assembly in the position that gives correct clearance between 

the airplane structure and the MC0543022-2C Steering Tube Assembly when the rudder pedals and 

nosewheel move through the full left and right positions, 

0 , Turn the nosewheel with a tow bar and move the copilot's rudder pedals at the same time while you 

look at the MC0543022-2C Steering Tube Assembly as it moves through its full range of motion, 

Make sure that the MC0543022-2C Steering Tube Assembly does not touch the 0500118-49 Fuel 

Retum Line Assembly or the airplane structure, 

E, Hold the 0500118-49 Fuel Return Line Assembly in the correct position while you torque the 8-nuts 

to 120 inch-pounds, +20 or -20 inch-pounds, 

6, Do a check to make sure that the 0500118-49 Fuel Return Line Assembly does not touch the right 

MC0543022-2C Steering Tube Assembly as follows: 

A, Turn the nosewheel with a tow bar and move the copilot's rudder pedals at the same time while you 

look at the MC0543022-2C Steering Tube Assembly as it moves through its full range of motion, 

(1) If the 0500118-49 Fuel Return Line Assembly touches the right MC0543022-2C Steering 

Tube Assembly or the airplane structure, you must loosen the two B-nuts that attach the 

0500118-49 Fuet Return Line Assembty and do Step 5B thru 5E again until the 050011 8-49 

Fuel Return Line Assembly does not touch the right MC0543022-2C Steering Tube Assembly 

or the airplane structure, Go to Step 7, 

(2) If the 0500 118-49 Fuel Return line Assembly does not touch the right MC0543022-2C Steering 

Tube Assembly or the airplane structure, go to Step 7, 

7. Push Ihe fuel shutoff valve handle forward to the ON position, 

8, Do a chack for leaks al the 0500 11 8-49 Fuel Return Lille Assembly, 

9 In ~t '1 !! !hp :=tr. r.~ss pl.;lt!? f?30BT) '1 nd tho urjr1 r rr::-m~ 1 ')r:~- r)ut r::tnel. -~ r to ~e ~0del 17? ~_! iDS 

1996 and On Maintenance Manual, Chapter G, Ac:es3J:nspec:ion Plates - .::;r iv n cmd Operal;on.) 

10, Install the copilot's seat. (Refer to the Model 172 Sbries 1996 and On Maintenance il.lanual, Chapter 25, 

i=i:g;ll ~"'iJ '-'I.;:tH - bl <Jinl Jf' tr'.:'_' ? ro.:l;,,;ti ,,;:..: .... ) 

Page 4 

SBO ,. -20-01 

June 18, 2007 
WARNING: FOLLOW ALL SAFETY PRECAUTIONS WHEN YOU WORK ON OR 

NEAR THE INFLATABLE RESTRAINT SYSTEM. THE INFLATOR 

ASSEMBLY IS A STORED, GAS/ENERGETIC MATERIAL DEVICE 

AND CAN CAUSE DAMAGE TO THE SYSTEM AND/OR INJURY TO 

PERSONNEL IF ACCIDENTALLY DEPLOYED 

11 . Arm the AMSAFE inflatable restraint systems. if Installed. (Refer to the Model 172 Series 1996 and On 

Maintenance Manual, Chapter 25. Inflatable Restraint System - Maintenance Practices.) 

12. For airplanes with the AM SAFE inflatable restraint system, do an operational check of the seat belt 

system. (Refer to the AMSAFE Supplemental Maintenance Manual, part number E508804.) 

13. Remove maintenance warning tags from battery and external power receptacle and connect the battery. 

14. Make an entry in the airplane logbook that states compliance and method of compliance with this 

Service Bulletin. 

SBUi-23·U I 

June 18. 2007 Page 5 
87778 

A 

A 

Firewall 

(Reference) 

AE3663163E0240 

Hose Assembly 

(Reference) 

AN832-4 

Union 

(Reference) 

AN924- 4 

Nut 

AN960-916L 

Washer 

(Reference) 

Fuel 

Shutoff 

Valve 

(Reference) 

(NOTE) 

Electrical 

Fuel 

Pump 

(Reference) 

MC0543022-2C 

Steering Tube 

Assembly 

.2:-___ (Reference) 

B-Nut 

(Reference) 

0500118-49 

Fuel Retum Line 

Assembly 

(1 If Required) 

• FWD 

VIEW A-A 

0516009-24 

Fuel 

Reservoir 

Assembly 

(Reference) 

B-Nut 0500118-53 

(Reference) Line 

S2218-4 Assembly 

Check Valve (Reference) (Reference) 

Looking Down at Correct Installation 

NOTE: Turn the nos'3wl1eel with a tow bar and move the copilot's rudder peda ~ 

at the same tim" while you look at the MC0543022-2C Steering Tube Assembly 

35 it mOV8S thro11:;h its full range of motion to ma!.;n re it d'Jes n01 touch 

tile 0:;00118-49 Fud Return Line s~ernbly or the airplane structure. IlS10T1Q07 

,u,rfi16TOl 5(l 

!:iBO (-La-Ot 

Page 6 June 13, 2007 
OWNER NOTIFICATION 

On June 18, 2007 the following message will be sent to applicable owners of record in SB07-28-01A. 

Dear Cessna Owner: 

This Owner Advisory is to inform you that Service Bulletin SB07-28-01 : Fuel Return line Inspection has 

been released. 

A report has been received that a part number 0500118-49 Fuel Return line Assembly was found rubbing 

against the right steering tube assembly during full rudder pedal actuation. 

Service Bulletin SB07-28-01 provides instructions to inspect the fuel return line for damage, and if necessary, 

repair or replace the line assembly. Non-compliance with this Service Bulletin could potentially result in 

a fuel leak. 

Compliance is mandatory: shall be accomplished at the next scheduled maintenance or inspection not to 

exceed 100 hours of operation or 12 months, whichever occurs first. 

The Information contained in Ihe referenced Cessna Service Bulletin shall be considered an amendment to the 

Cessna Manufacturer's Service/Maintenance Manual or Instructions for continued airworthiness, and must be 

accomplished for ongoing airworthiness compliance as required per 14 CFR Part 43.13. 

A labor allowance credit of 0.8 man-hour per airplane will be provided to inspect the fuel return line assembly 

as described in Service Bulletin SB07-28-01 . 

If necessary, an additional 0.4 man-hour per airplane will be provided to repair the fuel return line assembly or 

an additional 0.3 man-hour per airplane will be provided to replace the fuel return line assembly as described in 

Service Bulletin SB07-28-01 . 

To receive credit, the work must be completed and the Warranty Claim submitted by a Cessna Single Engine 

Service Station within 30 calendar days of Service Bulletin compliance before the credit expiration dates 

shown below. 

Domestic . . . , . . . . . • . . . . . . . . . . . June 18, 2008 

International .... . . . . . . . . . . . . . .. June 18, 2008 

Please contact a Cessna Single Engine Service Station for detailed information and arrange to have Cessna 

Service Bulletin SB07-28-01 accomplished on your airplane . 

SBO I-m-r) 1 

June 18,2007 

• • • • • •